Deleting files doesn't erase them. In fact, if you send files to the recycle bin, they are simply marked for later deletion......and even then, they aren't really deleted. What happens is that the space they take up is marked for reuse, and the first character of the filename is set to a special character. This special character is how undelete utilities work, the file contents are untouched! What this means that is your "deleted" files aren't really deleted at all. People with a little technical know-how can still read your files. ASL File Wiper isn't fancy, but it _is_ effective. What it does is write garbage to files you select, then calls the standard delete function in windows. That means that even if someone were to later go in to undelete a file, all they would get is garbage. Your sensitive files that you delete cannot then be undeleted later.